La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Dispersal and age at first breeding in Norwegian Northern Lapwings (Vanellus vanellus)
Auteurs :	Terje Lislevand, Auteur ; Ingvar Byrkjedal, Auteur ; Gaute Bo Gronstol, Auteur
Type de document :	Article
Dans :	Ornis Fennica (86(1) 2009)
Article en page(s) :	11-17
Langues:	Anglais
Résumé :	Dispersal and age at first breeding were studied in Northern Lapwings from south Norway. In total, 40 adult birds (two males) and 114 chicks were colour-ringed. There were no sex differences in returning rates of birds ringed as chicks (n = 10 males and 14 females). Nor were there sex differences in natal and breeding dispersal distances. When sexes were pooled, natal dispersal was longer than breeding dispersal (median distances 160 m and 62 m, respectively). Also, colour-ringed females were more likely than males to breed in their second calendar year. Analyses of a separate data set of regular ring recoveries largely confirmed the relatively low degree of natal dispersal in Norwegian Northern Lapwings. In total, 72% of birds reported during the breeding season (total n = 104) were found within 10 km from their natal site. Dispersal distances observed in Norway are similar to those reported from a comprehensive British study, and from Europe in general.

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